16. Which one of the following series represents the correct path of blood circu

Question

16. Which one of the following series represents the correct path of blood circulation? A) left atrium, left ventricle, lungs, right atrium, right ventricle, body B) Sup. Vena Cava, right ventricle, pulm.SL valve, pulm v., left ventricle C) left atrium, bicuspid valve, pulmonary trunk, right ventricle, lungs D) right atrium, lungs, right ventricle, left atrium, body, left ventricle E) left atrium, lungs, left ventricle, body, right atrium, right ventricle F) pulmonary vein, right ventricle, lungs, left atrium, aortic valve, body 17. The return of blood to the heart through veins depends upon A) B) C) D) E) semilunar valves contraction of the myocardium skeletal muscle contraction and relaxation all of the above A and C

Explanation / Answer

Correct pathway left atrium -left ventricle -lungs -right atrium -right ventricles. So correct ans. Option (A).

No.2 .it the skeletal muscle pump mechanism that increase venous return of heart.

Semilunar valve present in pulmonary trunk and forces blood to it when increase ventricular pressure.

When there is contraction of myocardium there is increase in force of contraction and increase in cardiac output

So ans.is option(C)

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